That really depends on how and where they are planted. If in the ground, 2" of water a week. If in a container, they will need to be watered once a day normally and twice a day when the temps go above 80F.

I am not sure...I think this is more a matter of individual perception. What one person smells will be different than what someone else smells. I do know that borage plants are said to both taste and smell like cucumbers.

Every year I plant my annual Pansies and the like. As time goes by, their roots end up being eaten. We have dug up old soil and put down new fresh soil, yet, something is still eating the roots of the flowers.

Pansies can pretty much take care of themselves in the cold. watering the ground before a particularly cold snap can help prolong them a bit when the really cold weather sets in, but other than that they really need no special care.